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Stock-based compensation (Tables)

6 Months Ended

Sep. 30, 2024

Stock-based compensation [Abstract]

Activities of Stock Option Plan

The following table summarizes information about activities within the Stock Option Plan for the six months period ended September 30, 2024:

		Number of options				Weighted-average exercise price				Remaining Contractual Term (years)				Aggregate Intrinsic Value (in thousands)
						$									$
Outstanding, March 31, 2024			721,793				3.68				9.08				527
Granted			198,130				2.96				—				—
Outstanding, September 30, 2024			919,923				3.53				8.80				294
Exercisable, September 30, 2024			453,681				4.22				8.48				162

Weighted-Average Assumptions of Options Granted

The weighted-average grant date fair value of awards for options granted during the six months ended September 30, 2024 was $2.52. The fair value of options granted was estimated using the Black-Scholes option pricing model, resulting in the following weighted-average assumptions for the options granted:

		September 30, 2024				September 30, 2023
		Weighted-average				Weighted-average
Exercise price		$	2.96			$	2.96
Share price		$	2.96			$	2.78
Dividend			—				—
Risk-free interest			4.43	%			4.94	%
Estimated life (years)			5.81				2.53
Expected volatility			114.37	%			84.36	%

Compensation Expense Recognized Under Stock Option Plan

Compensation expense recognized under the Stock Option Plan is summarized as follows:

		Three months ended								Six months ended
		September 30, 2024				September 30, 2023				September 30, 2024				September 30, 2023
			$				$				$				$
Research and development expenses			60				82				126				84
General and administrative expenses			142				198				314				274
			202				280				440				358

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Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

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-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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